71900 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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71900 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The 71900 CD/HCP4ADGA is a super-precision angular contact ball bearing designed for the most demanding applications. As a universal matchable bearing supplied in a duplex set, it excels in scenarios requiring exceptional rotational accuracy, high rigidity, and reliable high-speed operation. Its core advantages include the ability to accommodate combined radial and axial loads, a compact design for space-constrained installations, and superior performance enabled by its P4A tolerance class and ceramic ball construction.
71900 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71900 | Series and Size Designation | Indicates a super-precision, small bore diameter bearing series. |
| CD | Duplex Arrangement (Back-to-Back) | Provides high rigidity and excellent moment load capacity. |
| HC | Hybrid Ceramic | Signifies the use of ceramic balls, reducing centrifugal forces and enabling higher speeds. |
| P4A | Tolerance Class | Denotes super-precision running accuracy and dimensional tolerances. |
| DGA | Contact Angle & Preload | Specifies a 15° contact angle and an Extra Light (Class A) preload for optimal high-speed performance. |
71900 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The duplex back-to-back (DB) arrangement creates a rigid bearing system capable of withstanding combined loads and moment loads, making it ideal for precision spindles.
Superior High-Speed Performance: The combination of hybrid ceramic balls and a lightweight phenolic resin cage significantly reduces rotating mass and centrifugal forces. This allows the bearing to achieve an exceptionally high limiting speed of 165,000 rpm while maintaining low operating temperatures.
Ultra-Precision Operation: Manufactured to ABEC 7 / P4A tolerance standards, this bearing ensures minimal runout and vibration, which is critical for achieving superior surface finishes and positional accuracy in machining.
Universal Matchability (SU): This feature allows bearings to be mounted in any duplex combination (DB, DF, DT) without a loss of preload, providing flexibility in machine design and bearing arrangement.
71900 CD/HCP4ADGA Bearing Typical Application Areas
The 71900 CD/HCP4ADGA is engineered for high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- High-Frequency CNC Spindles for PCB drilling and precision milling
- Precision Grinding Spindles
- High-Speed Machine Tool Axes
- Dental and Medical Handpiece Drives
- Turbo-Molecular Pumps and other vacuum technology
